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Homework Help: Electron orbital magnetic moment

  1. Jun 8, 2010 #1
    1. The problem statement, all variables and given/known data

    An electron has a magnetic quantum number m=2.What is the magnitude of the orbital magnetic moment.
    2. Relevant equations

    mu=eL/2m


    3. The attempt at a solution

    Now i figured that the above equation gives the magnitude of the orbital moment and the equation for the z component gives us the direction in which it points. The solution is eh/m, which means that the z component was used to find the magnitude. This has me confused, because with the angular momentum we use L,to find the magnitude and L(z) for the z component.
    Why have they used the z component of the magnetic moment to find the magnitude?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jun 8, 2010 #2

    vela

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